Auxiliary equipment for valve grinding

ABSTRACT

An auxiliary equipment for valve grinding is provided, including a main body, a driving shaft, a first linkage, a second linkage, a third linkage and a driven shaft. The driving shaft defines a first axial direction. The driving shaft is for connecting to a rotating tool. One end of the first linkage is connected to the driving shaft. The second linkage and the other end of the first linkage are connected to a first movable connecting portion. One end of the third linkage and the second linkage are connected to a second movable connecting portion. The driven shaft defines a second axial direction. When the first linkage rotates together with the driving shaft, the first movable connecting portion rotates about the first axial direction, the second linkage swings about the first movable connecting portion, and the second movable connecting portion swings about the second axial direction.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an auxiliary equipment, and more particularly to an auxiliary equipment for valve grinding.

2. Description of the Prior Art

In industry, it is ordinary that an equipment, such as an engine cylinder, works with a high pressure inside and is disposed with valves. When the cylinder compresses inside, the valve has to be sealed so that a pressure inside rises. And when the cylinder releases the pressure, the valve lets off air. It is important and accurate for the valve to match with a contacting surface. However, the valve wears down in using after a period of time. So the valve and the contacting surface need to be regrinded to prevent the air from leaking. A prior art of valve grinding tool includes a handle bar, and a bottom end of the handle bar is provided with a sucking member for attaching the valve. And an abrasive paste with tiny abrasive particles is applied on a grinding surface of the valve. Then the handle bar is held by hand and rotated to grind the valve with the abrasive particles. The prior art is disclosed in U.S. Pat. No. 6,042,456.

However, the prior art needs to be driven by hand, and it takes lots of time and power or even causes an operator to have muscle aches.

A grinding tool driven by rotating tool is disclosed in U.S. Pat. No. 3,110,137. The grinding tool has only one rotating direction, and a grinding surface of the valve is nonuniformly grinded with a contacting surface. It highly affects an accuracy of the valve and the valve has a bad performance in sealing These disadvantages are needed to be improved.

The present invention has arisen to mitigate and/or obviate the afore-described disadvantages.

SUMMARY OF THE INVENTION

The primary object of the present invention is to provide an auxiliary equipment for valve grinding. The auxiliary equipment for valve grinding is driven by a rotating tool, and compared with grinding by using human power, it saves much more time and power. Moreover, the auxiliary equipment for valve grinding rotates reciprocatedly, and compared with grinding only in a single direction, the grinding method of rotating reciprocatedly is provided so that a grind area between the grinding surface of the valve and a contacting surface contacting with the grinding surface is more intact, and the contacting surface is smooth and without nonuniform angles, and a better sealing effect is provided for the valve.

To achieve the above object, an auxiliary equipment for valve grinding is provided, including a main body, a driving shaft, a first linkage, a second linkage, a third linkage and a driven shaft. The driving shaft defines a first axial direction and is rotatably assembled with the main body. The driving shaft is for connecting to a rotating tool. One end of the first linkage is fixedly connected to the driving shaft radially. The second linkage is movably connected with the other end of the first linkage via a first movable connecting portion. One end of the third linkage and the second linkage are movably connected with each other via a second movable connecting portion. The driven shaft defines a second axial direction and is fixedly connected to the other end of the third linkage. The first linkage, the second linkage and the third linkage are swingable relative to the first axial direction. When the first linkage rotates together with the driving shaft, the first movable connecting portion rotates about the first axial direction, the second linkage swings about the first movable connecting portion, and the second movable connecting portion swings reciprocatedly about the second axial direction.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a three-dimensional drawing of a preferred embodiment of the present invention;

FIG. 2 is a breakdown drawing of the preferred embodiment of the present invention;

FIG. 3 is a cross-sectional drawing of the preferred embodiment of the present invention;

FIG. 4 is a perspective drawing of the preferred embodiment of the present invention;

FIGS. 5 a, 5 b, 5 c are perspective drawings of the preferred embodiment of the present invention in motion;

FIG. 6 is a perspective drawing of the preferred embodiment of the present invention in operation.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention.

Referring to FIGS. 1-4, an auxiliary equipment 1 for valve grinding in accordance with a preferred embodiment of the present invention includes a main body 2, a driving shaft 3, a first linkage 4, a second linkage 5, a third linkage 6 and a driven shaft 7.

The main body 2 includes two shell members 21, and the two shell members 21 are detachably assembled and the first, second and third linkages 4, 5, 6 are disposed therein.

The driving shaft 3 defines a first axial direction and is rotatably assembled with the main body 2. The driving shaft 3 partially extends out of the two shell members 21 and is for connecting to a rotating tool 8 (as shown in FIG. 6).

An end of the first linkage 4 is fixedly connected to the driving shaft 3 radially. The second linkage 5 is movably connected with the other end of the first linkage 4 via a first movable connecting portion 41, and the first linkage 4 is movable relative to the second linkage 5. An end of the third linkage 6 and the second linkage 5 are movably connected with each other via a second movable connecting portion 51, and the second linkage 5 is movable relative to the third linkage 6.

Specifically, in the present embodiment, the first linkage 4 is shorter than the second linkage 5, and the second linkage 5 is shorter than the third linkage 6. An end of the second linkage 5 and the other end of the first linkage 4 are pivoted to the first movable connecting portion 41, and an end of the third linkage 6 and the other end of the second linkage 5 are pivoted to the second movable connecting portion 51.

The driven shaft 7 defines a second axial direction and partially extends out of the two shell members 21. The first linkage 4, the second linkage 5 and the third linkage 6 are swingable relative to the first axial direction. When the first linkage 4 rotates together with the driving shaft 3, the first movable connecting portion 41 rotates about the first axial direction, the second linkage 5 swings about the first movable connecting portion 41 and the second movable connecting portion 51 swings reciprocatedly about the second axial direction.

It is noted that, in the present embodiment, the second axial direction and the first axial direction are parallel to each other and non-coaxial. The driven shaft 7 is fixedly connected to the other end of the third linkage 6. A distal end of the driven shaft 7 is provided with a sucking member 72 for attaching on a valve so that the valve is fixedly disposed on the end. It is noted that a radial dimension of the sucking member 72 is preferably smaller than that of the valve. In the present embodiment, the sucking member 72 is such as a sucking disc. In other embodiments, the sucking member 72 can be other members.

Moreover, the main body 2 includes a first shaft sleeve portion 22 and a second shaft sleeve portion 23 oppositely extending along the first and second axial directions. The driving shaft 3 and the driven shaft 7 are respectively sleeved by and partially extend outside the first shaft sleeve portion 22 and the second shaft sleeve portion 23. The first shaft sleeve portion 22 and the second shaft sleeve portion 23 are provided for supporting the driving shaft 3 and the driven shaft 7 to align with axial directions, and it helps to improve working efficiency. Preferably, the driving shaft 3 further includes a first radial flange 31, and a radial dimension of the first radial flange 31 is greater than an opening dimension of the first shaft sleeve portion 22 so that the first radial flange 31 can get stuck in the opening of the first shaft sleeve portion 22. The driven shaft 7 further includes a second radial flange 71, and a radial dimension of the second radial flange 71 is greater than an opening dimension of the second shaft sleeve portion 23 so that the second radial flange 71 can get stuck in the opening of the second shaft sleeve portion 23. The first radial flange 31 and the second radial flange 71 are provided for fixing the driving shaft 3 and the driven shaft 7 so that the driving shaft 3 and the driven shaft 7 rotate along the axial direction without shaking.

Referring to FIGS. 5 a-5 c and FIG. 6, practically, when rotating and driving the driving shaft 3 with the rotating tool 8 connected to the driving shaft 3, the first linkage 4 with an end fixedly connected to the driving shaft 3 rotates with the driving shaft 3. And the first movable connecting portion 41 located on the other end of the first linkage 4 rotates about the first axial direction. So the second linkage 5 with an end pivoted to the first movable connecting portion 41 swings about the first movable connecting portion 41. The second movable connecting portion 51 is located on the other end of the second linkage 5 so that the second movable connecting portion 51 swings about the second linkage 5. An end of the third linkage 6 is located on the second movable connecting portion 51 and the other end of the third linkage 6 is fixedly connected to the driven shaft 7. When the first, second and third linkages 4, 5, 6 are overlapped on a straight line, the third linkage 6 swings to a turning point (as shown in FIG. 5 c). And the third linkage 6 swings in an opposite direction. When the second movable connecting portion 51 swings about the second axial direction reciprocatedly, the third linkage 6 swings about the second axial direction reciprocatedly and the driven shaft 7 fixedly connected with the third linkage 6 also swings reciprocatedly.

Moreover, the sucking member 72 disposed on an end of the driven shaft 7 is attached on the valve 9 so that the driven shaft 7 can rotate around the valve 9 (having an axial direction same as the second axial direction) reciprocatedly. The valve 9 and an abutting surface abutted against the valve 9 are rotated relative to each other reciprocatedly to grind the valve 9. Preferably, a grinding surface 91 of the valve 9 can be coated with an abrasive paste having tiny abrasive particles. It is noted that, compared with grinding the valve 9 by human power, it saves much more time and power by using the rotating tool 8 to drive the driven shaft 7. Compared to a prior art of polishing only in a single direction, a polishing method of which the driven shaft 7 rotates reciprocatedly in the present invention is provided so that a grind area between the grinding surface 91 of the valve 9 and a contacting surface contacting with the grinding surface 91 is more intact, and the contacting surface is smooth and without nonuniform angles.

Moreover, in other embodiments, the first, second and third linkages can have different lengths. For example, the first linkage is shorter than the third linkage and the third linkage is shorter than the second linkage. And the first axial direction and the second axial direction have a same axial direction. The other end of the first linkage is slidably connected with the second linkage via the first movable connecting portion. An end of the second linkage and the main body are pivoted to a third movable connecting portion. The other end of the second linkage and an end of the third linkage are slidably connected with each other via the second movable connecting portion. And the first movable connecting portion is located between the second movable connecting portion and the third movable connecting portion. When the driving shaft drives the first linkage to rotate, the first movable connecting portion rotates around the first axial direction. The second linkage is driven by the first movable connecting portion and swings about the third movable connecting portion reciprocatedly. The third linkage slidably connected with the second linkage via the second movable connecting portion swings about the second axial direction reciprocatedly. And the driven shaft fixedly connected with the third linkage also swings reciprocatedly. A grind area between the grinding surface of the valve and a contacting surface contacting with the grinding surface is more intact, and the contacting surface is smooth and without nonuniform angles.

As a conclusion, an auxiliary equipment for valve grinding of the present invention is driven by a rotating tool, and compared with grinding by human power, it saves much more time and power. Moreover, the auxiliary equipment for valve grinding rotates reciprocatedly, and compared with grinding only in a single direction, the grinding method of rotating reciprocatedly is provided so that a grind area between the grinding surface of the valve and a contacting surface contacting with the grinding surface is more intact, and the contacting surface is smooth and without nonuniform angles, and a better sealing effect is provided for the valve.

While we have shown and described various embodiments in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention. 

What is claimed is:
 1. An auxiliary equipment for valve grinding, comprising: a main body; a driving shaft, defining a first axial direction, rotatably assembled with the main body, and for connecting to a rotating tool; a first linkage, one end of the first linkage fixedly connected to the driving shaft radially; a second linkage, movably connected with the other end of the first linkage via a first movable connecting portion; a third linkage, one end of the third linkage and the second linkage movably connected with each other via a second movable connecting portion; a driven shaft, defining a second axial direction and fixedly connected to the other end of the third linkage axially; wherein the first linkage, the second linkage and the third linkage are swingable relative to the first axial direction, when the first linkage rotates together with the driving shaft, the first movable connecting portion rotates about the first axial direction, the second linkage swings about the first movable connecting portion and the second movable connecting portion swings reciprocatedly about the second axial direction.
 2. The auxiliary equipment for valve grinding as claimed in claim 1, wherein the main body includes two shell members, the two shell members are detachably assembled and the first, second and third linkages are disposed therein, and the driving shaft and the driven shaft partially extend outside the two shell members respectively.
 3. The auxiliary equipment for valve grinding as claimed in claim 1, wherein the main body includes a first shaft sleeve portion and a second shaft sleeve portion oppositely extending along the first and second axial directions, and the driving shaft and the driven shaft are respectively sleeved by and partially extend outside the first shaft sleeve portion and the second shaft sleeve portion.
 4. The auxiliary equipment for valve grinding as claimed in claim 3, wherein the driving shaft further includes a first radial flange, and a radial dimension of the first radial flange is greater than an opening dimension of the first shaft sleeve portion.
 5. The auxiliary equipment for valve grinding as claimed in claim 3, wherein the driven shaft further includes a second radial flange, and a radial dimension of the second radial flange is greater than an opening dimension of the second shaft sleeve portion.
 6. The auxiliary equipment for valve grinding as claimed in claim 1, wherein a distal end of the driven shaft is provided with a sucking member.
 7. The auxiliary equipment for valve grinding as claimed in claim 6, wherein the sucking member is a sucking disc.
 8. The auxiliary equipment for valve grinding as claimed in claim 1, wherein the first linkage is shorter than the second linkage, and the second linkage is shorter than the third linkage.
 9. The auxiliary equipment for valve grinding as claimed in claim 1, wherein an end of the second linkage and the other end of the first linkage are pivoted to the first movable connecting portion, and an end of the third linkage and the other end of the second linkage are pivoted to the second movable connecting portion.
 10. The auxiliary equipment for valve grinding as claimed in claim 9, wherein the second axial direction and the first axial direction are parallel to each other and non-coaxial. 